Carton



Jan. 2, 1951 L, D. L EHMAN 2,536,948

CARTON Filed Jan. 15, 1947 2 Sheets-Sheet 1 INVENTOR. LINCOLN D. LEHMAL. D. LEHMAN CARTON Jan. 2, 1951 K 2 Sheets Sheet 2 Filed Jan. 15, 1947INVENTOR. LINCOLN 0. LEHAN Patented Jan. 2, 1951 UNITED STATES PATENTOFFICE CARTON Lincoln D. Lehman, Portland, Oreg. Application January 15,1947, Serial N 0. 722,230

2 Claims. IV

This invention relates to improvements in cartons and is particularlyadapted to be used in connection with heat and cold insulating cartons.

The primary object of the invention is to construct a carton of onepiece of material in such a manner as to prevent leakage of liquidstherethrough by forming the same out of one piece of material.

A further object of the invention is to provide a closure lid having ameans of bracing the carton together when the lid is closed, said meansalso maintaining the lid in closed position.

My new and improved carton is so cut out of sheet material as to formthe entire carton, both side walls, ends and cover, and at the same timethe carton is cut it is creased in such a manner as to provide for easyfolding and forming of the carton.

These and other incidental objects will be apparent in the drawings,specifications and claims.

Referring to the drawings:

Figure 1 is a perspective view of the carton in erected position, thelid open and parts broken away for convenience of illustration.

Figure 2 is a perspective view of the carton in fully erected and closedposition.

Figure 3 is a fragmentary partially erected perspective view of thecarton showing the end being folded.

Figure 4 is a side view of Figure 3.

Figure 5 is an enlarged fragmentary end View of Figure 2, illustratingthe lid in closed position and showing the lid being closed by thebroken lines.

Figure 6 is a semi-folded view of the carton.

Figure '7 is an enlarged fragmentary sectional view taken on line 1-1 ofFigure 2, particularly made to illustrate the cover in closed position.

In the drawings:

My new and improved carton consists of a sheet of material I, that isfolded to form a bottom 2, side walls 3 and 4, and end walls 5 and 6having tongues l extending from their free edges. The side and end wallsare joined together by webs S, which are folded inwardly at 9 and It asthe carton is being formed.

When the sheet material I is out to shape and creased along lines 9, H),H, l2, l3, l4, l5, [6, I1, [8, l9 and 2a, the carton may be formed atany time that it is needed. The sheet is best shown, partially folded,in Figure 6, and the formed carton is best shown in Figure 1.

I will now describe the erecting of my new and improved carton,referring especially to Figures 3,

4 and 6. The tongues l are notched at 1A to form outwardly extendingprongs on each side. The webs 8 are folded on their fold lines 9 and I6,and the prongs of the tongues l are inserted within the folds of thewebs 8 adjacent the fold lines 9 and 16, as best illustrated in Figures3 and 4. The insertion of the tongue 7 within the webs in this mannermakes it very easy to form the ends of the carton as the notch IA of thetongue guides and maintains the webs in alignment while erecting thecarton, the webs taking their position adjacent the end walls 5 and 8 asbest illustrat ed in Figure 1. In the completin of this foldingoperation the side walls 3 and t are also folded along their creaselines It and H, to the position shown in Figure 1, by the folding of thewebs 8.

I will now describe the operation of closing the cover. The cover 2|extends from the side wall 3 and is folded along a crease line I8. Tabs22 are formed on the ends of the cover for cooperation with the cut-outportions 23 of the end walls 5 and 6. By referring to Figure 5, thedotted lines indicate the position of the cover while these tabs arebeing inserted into the cut-out portions in the closing of said cover.The flap 2'! of the cover is then inserted within the side wall 4, thetabs 22 maintaining the cover in closed position and at the same timepreventing the end walls of the carton from spreading.

The tabs 22 are notched at 30, this notch engaging the underside of thecrease i'l between the end walls 5 and 8 and their tongues 1, bestillustrated in Figures 2 and 5. This is one of the outstanding featuresof my new and improved carton wherein the tabs forming part of the covermaintain the cover in closed position and at the same time brace the endwalls of the carton.

Another outstanding feature of my invention resides in the fact that thecarton is formed from one piece of material, the webs joining the sideand end walls, thereby preventing any leakage of the contents of thecarton. A further feature resides in the method of folding and erectingthe carton, best illustrated in Figures 3 and 4, wherein the edges ofthe notch 1A of the tongue I force the proper folding of the webs 8,bringing the carton to its erected position as illustrated in Figure 1.

I do not wish to be limited to the exact structure as other equivalentsmay be substituted still coming within the scope of my claims.

I claim:

1. A carton formed from a single sheet of material comprising a bottomwall. side and end walls folded up at opposite sides of said bottom wallwebs connecting the adjacent edges of said side and end walls and foldedfrom the opposite side walls inwardly along median lines and againstsaid end walls, and tongues on said end walls, said tongues beingnotched in their free edges remote from the respective end walls to forma pair of prongs in each tongue with the prongs extending away from theend walls and each pair of prongs having adjacent edges which divergeangularly from a, junction centrally of the respective tongues, saidtongues being folded over and their pairs of prongsv respectively beinginserted within the webs folded against the corresponding end Wall withthe diverging edges of said pairs of prongs coinciding with and nestedin the median fold lines of said webs to anchor said webs and lock saidside and end walls in upright position. 6

2. A carton formed from a single sheet of material comprising a bottomwall, side and end Walls folded up at opposite sides of said bottomwall, a top wall folded over from the top of one side wall, a tuck-inflap hingedly folded down from the edge of said top wall opposite itshinge fold and insertable within the opposite side wall, webs connectingthe adjacent edges of said side and end walls and folded from theopposite side walls inwardly alon median lines and against said endwalls, tongues on said end walls, said tongues being notched in theirfree edges remote from the respective end walls to form a pair of prongsin each tongue with the prongs extending away from the end walls andeach pair of prongs having adjacent edges which diverge angularly from ajunction centrally of the respective tongues,

said tongues being folded over and their pairs of prongs respectivelybein inserted within the webs folded against the corresponding end wallwith the diverging edges of said pairs of prongs coinciding with andnested in the median fold lines of said webs to anchor said webs andlock said side and end walls in upright position, openings centrally insaid end Walls and interrupting the fold lines between said walls andtheir tongues to open at the top of said end walls when said tongues arefolded ver, and hook-like tabs folded down from the end edges of saidtop wall for insertion through said openings and between said end wallsand their folded over tongues, said tabs bein centrally of said top wallwith the hooks extending rearwardly of said openings and insertable andretractable relative to said openings by flexure of said top wallbetween said hooks and its hinge fold.

' LINCOLN D. LEI-IMAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 546,767 Knobeloch Sept. 24, 1895802,916 Crompton Oct. 24, 1905 965,276 Brooke July 26, 1910 2,041,021Quagliotti May 19, 1936 2,358,943 Smith Sept. 26, 1944 2,404,067 HillJuly 16, 1946

